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colorconverter.js
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colorconverter.js
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var colorConverter;
(function (colorConverter) {
function xyBriToRgb(xyb) {
if(0 > xyb.x || xyb.x > .8) {
throw 'x property must be between 0 and .8, but is: ' + xyb.x;
}
if(0 > xyb.y || xyb.y > 1) {
throw 'y property must be between 0 and 1, but is: ' + xyb.y;
}
if(0 > xyb.bri || xyb.bri > 1) {
throw 'bri property must be between 0 and 1, but is: ' + xyb.bri;
}
var x = xyb.x;
var y = xyb.y;
var z = 1.0 - x - y;
var Y = xyb.bri;
var X = (Y / y) * x;
var Z = (Y / y) * z;
var r = X * 1.612 - Y * 0.203 - Z * 0.302;
var g = -X * 0.509 + Y * 1.412 + Z * 0.066;
var b = X * 0.026 - Y * 0.072 + Z * 0.962;
r = r <= 0.0031308 ? 12.92 * r : (1.0 + 0.055) * Math.pow(r, (1.0 / 2.4)) - 0.055;
g = g <= 0.0031308 ? 12.92 * g : (1.0 + 0.055) * Math.pow(g, (1.0 / 2.4)) - 0.055;
b = b <= 0.0031308 ? 12.92 * b : (1.0 + 0.055) * Math.pow(b, (1.0 / 2.4)) - 0.055;
var cap = function (x) {
return Math.max(0, Math.min(1, x));
};
return {
r: cap(r),
g: cap(g),
b: cap(b)
};
}
colorConverter.xyBriToRgb = xyBriToRgb;
function rgbToXyBri(rgb) {
if(0 > rgb.r || rgb.r > 1 || 0 > rgb.g || rgb.g > 1 || 0 > rgb.b || rgb.b > 1) {
throw "r, g, and, b properties must be between 0 and 1";
}
var red = rgb.r;
var green = rgb.g;
var blue = rgb.b;
var r = (red > 0.04045) ? Math.pow((red + 0.055) / (1.0 + 0.055), 2.4) : (red / 12.92);
var g = (green > 0.04045) ? Math.pow((green + 0.055) / (1.0 + 0.055), 2.4) : (green / 12.92);
var b = (blue > 0.04045) ? Math.pow((blue + 0.055) / (1.0 + 0.055), 2.4) : (blue / 12.92);
var X = r * 0.649926 + g * 0.103455 + b * 0.197109;
var Y = r * 0.234327 + g * 0.743075 + b * 0.022598;
var Z = r * 0.0000000 + g * 0.053077 + b * 1.035763;
var cx = X / (X + Y + Z);
var cy = Y / (X + Y + Z);
if(isNaN(cx)) {
cx = 0.0;
}
if(isNaN(cy)) {
cy = 0.0;
}
return {
x: cx,
y: cy,
bri: Y
};
}
colorConverter.rgbToXyBri = rgbToXyBri;
function rgbToHexString(rgb) {
function f(x) {
x = Math.round(x * 255);
var s = '0' + x.toString(16);
return s.substr(-2);
}
return f(rgb.r) + f(rgb.g) + f(rgb.b);
}
colorConverter.rgbToHexString = rgbToHexString;
function hexStringToRgb(s) {
return {
r: parseInt(s.substring(0, 2), 16) / 255,
g: parseInt(s.substring(2, 4), 16) / 255,
b: parseInt(s.substring(4, 6), 16) / 255
};
}
colorConverter.hexStringToRgb = hexStringToRgb;
function hexStringToXyBri(s) {
return rgbToXyBri(hexStringToRgb(s));
}
colorConverter.hexStringToXyBri = hexStringToXyBri;
var hueBulbs = [
'LCT001'
];
var livingColors = [
'LLC006',
'LLC007',
];
function triangleForModel(model) {
if(hueBulbs.indexOf(model) > -1) {
return {
r: {
x: .675,
y: .322
},
g: {
x: .4091,
y: .518
},
b: {
x: .167,
y: .04
}
};
} else if(livingColors.indexOf(model) > -1) {
return {
r: {
x: .704,
y: .296
},
g: {
x: .2151,
y: .7106
},
b: {
x: .138,
y: .08
}
};
} else {
return {
r: {
x: 1,
y: 0
},
g: {
x: 0,
y: 1
},
b: {
x: 0,
y: 0
}
};
}
}
function crossProduct(p1, p2) {
return (p1.x * p2.y - p1.y * p2.x);
}
function isPointInTriangle(p, triangle) {
var red = triangle.r;
var green = triangle.g;
var blue = triangle.b;
var v1 = {
x: green.x - red.x,
y: green.y - red.y
};
var v2 = {
x: blue.x - red.x,
y: blue.y - red.y
};
var q = {
x: p.x - red.x,
y: p.y - red.y
};
var s = crossProduct(q, v2) / crossProduct(v1, v2);
var t = crossProduct(v1, q) / crossProduct(v1, v2);
return (s >= 0.0) && (t >= 0.0) && (s + t <= 1.0);
}
function closestPointOnLine(a, b, p) {
var ap = {
x: p.x - a.x,
y: p.y - a.y
};
var ab = {
x: b.x - a.x,
y: b.y - a.y
};
var ab2 = ab.x * ab.x + ab.y * ab.y;
var ap_ab = ap.x * ab.x + ap.y * ab.y;
var t = ap_ab / ab2;
t = Math.min(1, Math.max(0, t));
return {
x: a.x + ab.x * t,
y: a.y + ab.y * t
};
}
function distance(p1, p2) {
var dx = p1.x - p2.x;
var dy = p1.y - p2.y;
var dist = Math.sqrt(dx * dx + dy * dy);
return dist;
}
function xyForModel(xy, model) {
var triangle = triangleForModel(model);
if(isPointInTriangle(xy, triangle)) {
return xy;
}
var pAB = closestPointOnLine(triangle.r, triangle.g, xy);
var pAC = closestPointOnLine(triangle.b, triangle.r, xy);
var pBC = closestPointOnLine(triangle.g, triangle.b, xy);
var dAB = distance(xy, pAB);
var dAC = distance(xy, pAC);
var dBC = distance(xy, pBC);
var lowest = dAB;
var closestPoint = pAB;
if(dAC < lowest) {
lowest = dAC;
closestPoint = pAC;
}
if(dBC < lowest) {
lowest = dBC;
closestPoint = pBC;
}
return closestPoint;
}
colorConverter.xyForModel = xyForModel;
function xyBriForModel(xyb, model) {
var xy = xyForModel(xyb, model);
return {
x: xy.x,
y: xy.y,
bri: xyb.bri
};
}
colorConverter.xyBriForModel = xyBriForModel;
})(colorConverter || (colorConverter = {}));